<?php
define("TOKEN", "CFMWechat");
class Wechat
{
	private function checkSignature()
	{
        $signature = $_GET["signature"];
        $timestamp = $_GET["timestamp"];
        $nonce = $_GET["nonce"];		        		
		$token = TOKEN;
		$tmpArr = array($token, $timestamp, $nonce);
		sort($tmpArr, SORT_STRING);
		$tmpStr = implode( $tmpArr );
		$tmpStr = sha1( $tmpStr );		
		if( $tmpStr == $signature )
		{
			return true;
		}
		else
		{
			return false;
		}
	}
}
?>